GennadySpb

Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

Checking your Raspberry Pi's view of its power supply

Sometimes it seems like the first (and sometimes only) advice you get offered for almost any problem with a Raspberry Pi is "check your power supply". You think something like:

"hey, I'm using an official power supply sold as being matched with my Pi so how can there be any problem?"

You look up the specs then stick a controlled load across your supply and confirm that it can deliver the required number of Watts.

Yet your problems persist…

Linux Desktop on Apple Silicon in Practice

I bought M1 MacBook Air. It is the fastest computer I have, and I have been a GNOME/GNU/Linux user for long time. It is obvious conclusion that I need practical Linux desktop environment on Apple Silicon.

Fortunately, Linux already works on Apple Silicon/M1. But how practical is it?

Two native ports exist.

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

Prerequisite: latest Docker for Mac on MacOS Sierra

$ brew update
$ brew install --HEAD xhyve
$ brew install docker-machine-driver-xhyve
$ sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
$ sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve

$ curl -Lo minikube https://storage.googleapis.com/minikube/releases/v0.18.0/minikube-darwin-amd64 &amp;&amp; chmod +x minikube &amp;&amp; sudo mv minikube /usr/local/bin/

	package main

	import (
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"path/filepath"
	"runtime"
	"strings"

	# .circleci/config.yml

	version: 2.1

	jobs:
	# This build job just tests that the binary can build. If your project is a
	# library, not a binary, you don't need this build job. In other words, omit
	# this job if you don't have a func main() in your project.
	build:
	docker:

	tap "ethereum/ethereum"
	tap "heroku/brew"
	tap "homebrew/boneyard"
	tap "homebrew/bundle"
	tap "homebrew/cask"
	tap "homebrew/cask-versions"
	tap "homebrew/core"
	tap "paritytech/paritytech"
	cask "java"
	brew "ansible"

	#!/usr/bin/env bash

	# ldap2json.sh
	#
	# Example shell script showing how to parse LDIF output from the
	# ldapsearch command into a json array. Please note that this
	# script almost certainly does not handle every edge case, and
	# is best used to pull a handful of fields a user or group
	# record in a FreeIPA ldap server and format them as JSON for use
	# in other tools.

	import pathlib
	import re

	SUMMARY_LINE_RE = re.compile(r':(?P<name>\S+) \((?P<code>.+?)\):( \(?P<summary>.+)\)?')


	def parse_summary_line(line):
	line_match = SUMMARY_LINE_RE.match(line)
	if not line_match:
	raise ValueError(f"ill-formed line: {line!r}")